<?xml version="1.0" encoding="ascii"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
          "DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
  <title>SatStress.GridCalc</title>
  <link rel="stylesheet" href="epydoc.css" type="text/css" />
  <script type="text/javascript" src="epydoc.js"></script>
</head>

<body bgcolor="white" text="black" link="blue" vlink="#204080"
      alink="#204080">
<!-- ==================== NAVIGATION BAR ==================== -->
<table class="navbar" border="0" width="100%" cellpadding="0"
       bgcolor="#a0c0ff" cellspacing="0">
  <tr valign="middle">
  <!-- Home link -->
      <th>&nbsp;&nbsp;&nbsp;<a
        href="SatStress-module.html">Home</a>&nbsp;&nbsp;&nbsp;</th>

  <!-- Tree link -->
      <th>&nbsp;&nbsp;&nbsp;<a
        href="module-tree.html">Trees</a>&nbsp;&nbsp;&nbsp;</th>

  <!-- Index link -->
      <th>&nbsp;&nbsp;&nbsp;<a
        href="identifier-index.html">Indices</a>&nbsp;&nbsp;&nbsp;</th>

  <!-- Help link -->
      <th>&nbsp;&nbsp;&nbsp;<a
        href="help.html">Help</a>&nbsp;&nbsp;&nbsp;</th>

  <!-- Project homepage -->
      <th class="navbar" align="right" width="100%">
        <table border="0" cellpadding="0" cellspacing="0">
          <tr><th class="navbar" align="center"
            ><a class="navbar" target="_top" href="http://code.google.com/p/satstress">SatStress</a></th>
          </tr></table></th>
  </tr>
</table>
<table width="100%" cellpadding="0" cellspacing="0">
  <tr valign="top">
    <td width="100%">
      <span class="breadcrumbs">
        <a href="SatStress-module.html">Package&nbsp;SatStress</a> ::
        Module&nbsp;GridCalc
      </span>
    </td>
    <td>
      <table cellpadding="0" cellspacing="0">
        <!-- hide/show private -->
        <tr><td align="right"><span class="options"
            >[<a href="frames.html" target="_top">frames</a
            >]&nbsp;|&nbsp;<a href="SatStress.GridCalc-pysrc.html"
            target="_top">no&nbsp;frames</a>]</span></td></tr>
      </table>
    </td>
  </tr>
</table>
<h1 class="epydoc">Source Code for <a href="SatStress.GridCalc-module.html">Module SatStress.GridCalc</a></h1>
<pre class="py-src">
<a name="L1"></a><tt class="py-lineno">  1</tt>  <tt class="py-line"><tt class="py-docstring">"""</tt> </tt>
<a name="L2"></a><tt class="py-lineno">  2</tt>  <tt class="py-line"><tt class="py-docstring">Calculate stresses on an icy satellite over a rectangular geographic region on</tt> </tt>
<a name="L3"></a><tt class="py-lineno">  3</tt>  <tt class="py-line"><tt class="py-docstring">a regularly spaced lat-lon grid.</tt> </tt>
<a name="L4"></a><tt class="py-lineno">  4</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L5"></a><tt class="py-lineno">  5</tt>  <tt class="py-line"><tt class="py-docstring">The datacube containing the results of the calculation are output as a</tt> </tt>
<a name="L6"></a><tt class="py-lineno">  6</tt>  <tt class="py-line"><tt class="py-docstring">U{Unidata netCDF &lt;http://www.unidata.ucar.edu/software/netcdf&gt;} (.nc) file,</tt> </tt>
<a name="L7"></a><tt class="py-lineno">  7</tt>  <tt class="py-line"><tt class="py-docstring">which can be displayed using a wide variety of visualization software.</tt> </tt>
<a name="L8"></a><tt class="py-lineno">  8</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L9"></a><tt class="py-lineno">  9</tt>  <tt class="py-line"><tt class="py-docstring">"""</tt> </tt>
<a name="L10"></a><tt class="py-lineno"> 10</tt>  <tt class="py-line"> </tt>
<a name="L11"></a><tt class="py-lineno"> 11</tt>  <tt class="py-line"><tt class="py-keyword">import</tt> <tt id="link-0" class="py-name" targets="Package SatStress=SatStress-module.html,Module SatStress.SatStress=SatStress.SatStress-module.html"><a title="SatStress
SatStress.SatStress" class="py-name" href="#" onclick="return doclink('link-0', 'SatStress', 'link-0');">SatStress</a></tt> <tt class="py-keyword">as</tt> <tt class="py-name">SS</tt> </tt>
<a name="L12"></a><tt class="py-lineno"> 12</tt>  <tt class="py-line"><tt class="py-keyword">import</tt> <tt class="py-name">time</tt> </tt>
<a name="L13"></a><tt class="py-lineno"> 13</tt>  <tt class="py-line"><tt class="py-keyword">import</tt> <tt class="py-name">netCDF3</tt> </tt>
<a name="L14"></a><tt class="py-lineno"> 14</tt>  <tt class="py-line"><tt class="py-keyword">import</tt> <tt class="py-name">physcon</tt> <tt class="py-keyword">as</tt> <tt class="py-name">pc</tt> </tt>
<a name="L15"></a><tt class="py-lineno"> 15</tt>  <tt class="py-line"><tt class="py-keyword">import</tt> <tt class="py-name">numpy</tt> </tt>
<a name="L16"></a><tt class="py-lineno"> 16</tt>  <tt class="py-line"><tt class="py-keyword">from</tt> <tt class="py-name">numpy</tt> <tt class="py-keyword">import</tt> <tt class="py-name">linalg</tt> </tt>
<a name="L17"></a><tt class="py-lineno"> 17</tt>  <tt class="py-line"><tt class="py-keyword">import</tt> <tt class="py-name">scipy</tt> </tt>
<a name="L18"></a><tt class="py-lineno"> 18</tt>  <tt class="py-line"><tt class="py-keyword">from</tt> <tt class="py-name">optparse</tt> <tt class="py-keyword">import</tt> <tt class="py-name">OptionParser</tt> </tt>
<a name="L19"></a><tt class="py-lineno"> 19</tt>  <tt class="py-line"> </tt>
<a name="L20"></a><tt class="py-lineno"> 20</tt>  <tt class="py-line"> </tt>
<a name="main"></a><div id="main-def"><a name="L21"></a><tt class="py-lineno"> 21</tt> <a class="py-toggle" href="#" id="main-toggle" onclick="return toggle('main');">-</a><tt class="py-line"><tt class="py-keyword">def</tt> <a class="py-def-name" href="SatStress.GridCalc-module.html#main">main</a><tt class="py-op">(</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="main-collapsed" style="display:none;" pad="+++" indent="++++"></div><div id="main-expanded"><a name="L22"></a><tt class="py-lineno"> 22</tt>  <tt class="py-line">    <tt class="py-docstring">"""</tt> </tt>
<a name="L23"></a><tt class="py-lineno"> 23</tt>  <tt class="py-line"><tt class="py-docstring">    Calculate satellite stresses on a regular grid within a lat-lon window.</tt> </tt>
<a name="L24"></a><tt class="py-lineno"> 24</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L25"></a><tt class="py-lineno"> 25</tt>  <tt class="py-line"><tt class="py-docstring">    """</tt> </tt>
<a name="L26"></a><tt class="py-lineno"> 26</tt>  <tt class="py-line"> </tt>
<a name="L27"></a><tt class="py-lineno"> 27</tt>  <tt class="py-line">    <tt class="py-name">usage</tt> <tt class="py-op">=</tt> <tt class="py-string">"usage: %prog [options] satfile gridfile outfile"</tt>  </tt>
<a name="L28"></a><tt class="py-lineno"> 28</tt>  <tt class="py-line">    <tt class="py-name">description</tt> <tt class="py-op">=</tt> <tt class="py-name">__doc__</tt> </tt>
<a name="L29"></a><tt class="py-lineno"> 29</tt>  <tt class="py-line">    <tt class="py-name">op</tt> <tt class="py-op">=</tt> <tt class="py-name">OptionParser</tt><tt class="py-op">(</tt><tt class="py-name">usage</tt><tt class="py-op">)</tt> </tt>
<a name="L30"></a><tt class="py-lineno"> 30</tt>  <tt class="py-line"> </tt>
<a name="L31"></a><tt class="py-lineno"> 31</tt>  <tt class="py-line">    <tt class="py-op">(</tt><tt class="py-name">options</tt><tt class="py-op">,</tt> <tt class="py-name">args</tt><tt class="py-op">)</tt> <tt class="py-op">=</tt> <tt class="py-name">op</tt><tt class="py-op">.</tt><tt class="py-name">parse_args</tt><tt class="py-op">(</tt><tt class="py-op">)</tt> </tt>
<a name="L32"></a><tt class="py-lineno"> 32</tt>  <tt class="py-line"> </tt>
<a name="L33"></a><tt class="py-lineno"> 33</tt>  <tt class="py-line">    <tt class="py-comment"># Do a little error checking on the arguments:</tt> </tt>
<a name="L34"></a><tt class="py-lineno"> 34</tt>  <tt class="py-line"><tt class="py-comment"></tt>    <tt class="py-keyword">if</tt> <tt class="py-name">len</tt><tt class="py-op">(</tt><tt class="py-name">args</tt><tt class="py-op">)</tt> <tt class="py-op">!=</tt> <tt class="py-number">3</tt><tt class="py-op">:</tt> </tt>
<a name="L35"></a><tt class="py-lineno"> 35</tt>  <tt class="py-line">        <tt class="py-name">op</tt><tt class="py-op">.</tt><tt class="py-name">error</tt><tt class="py-op">(</tt><tt class="py-string">"incorrect number of arguments"</tt><tt class="py-op">)</tt> </tt>
<a name="L36"></a><tt class="py-lineno"> 36</tt>  <tt class="py-line">  </tt>
<a name="L37"></a><tt class="py-lineno"> 37</tt>  <tt class="py-line">    <tt class="py-comment"># The satfile defines the satellite and forcings it is subject to:</tt> </tt>
<a name="L38"></a><tt class="py-lineno"> 38</tt>  <tt class="py-line"><tt class="py-comment"></tt>    <tt class="py-name">satfile</tt> <tt class="py-op">=</tt> <tt class="py-name">open</tt><tt class="py-op">(</tt><tt class="py-name">args</tt><tt class="py-op">[</tt><tt class="py-number">0</tt><tt class="py-op">]</tt><tt class="py-op">,</tt> <tt class="py-string">'r'</tt><tt class="py-op">)</tt> </tt>
<a name="L39"></a><tt class="py-lineno"> 39</tt>  <tt class="py-line">    <tt class="py-name">the_sat</tt> <tt class="py-op">=</tt> <tt class="py-name">SS</tt><tt class="py-op">.</tt><tt id="link-1" class="py-name" targets="Class SatStress.SatStress.Satellite=SatStress.SatStress.Satellite-class.html"><a title="SatStress.SatStress.Satellite" class="py-name" href="#" onclick="return doclink('link-1', 'Satellite', 'link-1');">Satellite</a></tt><tt class="py-op">(</tt><tt class="py-name">satfile</tt><tt class="py-op">)</tt> </tt>
<a name="L40"></a><tt class="py-lineno"> 40</tt>  <tt class="py-line">    <tt class="py-name">satfile</tt><tt class="py-op">.</tt><tt class="py-name">close</tt><tt class="py-op">(</tt><tt class="py-op">)</tt> </tt>
<a name="L41"></a><tt class="py-lineno"> 41</tt>  <tt class="py-line"> </tt>
<a name="L42"></a><tt class="py-lineno"> 42</tt>  <tt class="py-line">    <tt class="py-comment"># The gridfile defines the scope and resolution of the calculation:</tt> </tt>
<a name="L43"></a><tt class="py-lineno"> 43</tt>  <tt class="py-line"><tt class="py-comment"></tt>    <tt class="py-name">gridfile</tt> <tt class="py-op">=</tt> <tt class="py-name">open</tt><tt class="py-op">(</tt><tt class="py-name">args</tt><tt class="py-op">[</tt><tt class="py-number">1</tt><tt class="py-op">]</tt><tt class="py-op">,</tt> <tt class="py-string">'r'</tt><tt class="py-op">)</tt> </tt>
<a name="L44"></a><tt class="py-lineno"> 44</tt>  <tt class="py-line">    <tt class="py-name">the_grid</tt> <tt class="py-op">=</tt> <tt id="link-2" class="py-name" targets="Class SatStress.GridCalc.Grid=SatStress.GridCalc.Grid-class.html"><a title="SatStress.GridCalc.Grid" class="py-name" href="#" onclick="return doclink('link-2', 'Grid', 'link-2');">Grid</a></tt><tt class="py-op">(</tt><tt class="py-name">gridfile</tt><tt class="py-op">,</tt> <tt id="link-3" class="py-name" targets="Variable SatStress.SatStress.StressDef.satellite=SatStress.SatStress.StressDef-class.html#satellite"><a title="SatStress.SatStress.StressDef.satellite" class="py-name" href="#" onclick="return doclink('link-3', 'satellite', 'link-3');">satellite</a></tt><tt class="py-op">=</tt><tt class="py-name">the_sat</tt><tt class="py-op">)</tt> </tt>
<a name="L45"></a><tt class="py-lineno"> 45</tt>  <tt class="py-line">    <tt class="py-name">gridfile</tt><tt class="py-op">.</tt><tt class="py-name">close</tt><tt class="py-op">(</tt><tt class="py-op">)</tt> </tt>
<a name="L46"></a><tt class="py-lineno"> 46</tt>  <tt class="py-line"> </tt>
<a name="L47"></a><tt class="py-lineno"> 47</tt>  <tt class="py-line">    <tt class="py-comment"># Initialize a StressCalc object for the diurnal and NSR stresses</tt> </tt>
<a name="L48"></a><tt class="py-lineno"> 48</tt>  <tt class="py-line"><tt class="py-comment"></tt>    <tt class="py-name">diurnal_stress</tt> <tt class="py-op">=</tt> <tt class="py-name">SS</tt><tt class="py-op">.</tt><tt id="link-4" class="py-name" targets="Class SatStress.SatStress.StressCalc=SatStress.SatStress.StressCalc-class.html"><a title="SatStress.SatStress.StressCalc" class="py-name" href="#" onclick="return doclink('link-4', 'StressCalc', 'link-4');">StressCalc</a></tt><tt class="py-op">(</tt><tt class="py-op">[</tt><tt class="py-name">SS</tt><tt class="py-op">.</tt><tt id="link-5" class="py-name" targets="Class SatStress.SatStress.Diurnal=SatStress.SatStress.Diurnal-class.html"><a title="SatStress.SatStress.Diurnal" class="py-name" href="#" onclick="return doclink('link-5', 'Diurnal', 'link-5');">Diurnal</a></tt><tt class="py-op">(</tt><tt class="py-name">the_sat</tt><tt class="py-op">)</tt><tt class="py-op">,</tt><tt class="py-op">]</tt><tt class="py-op">)</tt> </tt>
<a name="L49"></a><tt class="py-lineno"> 49</tt>  <tt class="py-line">    <tt class="py-name">nsr_stress</tt> <tt class="py-op">=</tt> <tt class="py-name">SS</tt><tt class="py-op">.</tt><tt id="link-6" class="py-name"><a title="SatStress.SatStress.StressCalc" class="py-name" href="#" onclick="return doclink('link-6', 'StressCalc', 'link-4');">StressCalc</a></tt><tt class="py-op">(</tt><tt class="py-op">[</tt><tt class="py-name">SS</tt><tt class="py-op">.</tt><tt id="link-7" class="py-name" targets="Class SatStress.SatStress.NSR=SatStress.SatStress.NSR-class.html"><a title="SatStress.SatStress.NSR" class="py-name" href="#" onclick="return doclink('link-7', 'NSR', 'link-7');">NSR</a></tt><tt class="py-op">(</tt><tt class="py-name">the_sat</tt><tt class="py-op">)</tt><tt class="py-op">,</tt><tt class="py-op">]</tt><tt class="py-op">)</tt> </tt>
<a name="L50"></a><tt class="py-lineno"> 50</tt>  <tt class="py-line"> </tt>
<a name="L51"></a><tt class="py-lineno"> 51</tt>  <tt class="py-line">    <tt class="py-comment"># Make a netCDF object, and set its metadata</tt> </tt>
<a name="L52"></a><tt class="py-lineno"> 52</tt>  <tt class="py-line"><tt class="py-comment"></tt>    <tt class="py-comment"># Create a netCDF file object to stick the calculation results in:</tt> </tt>
<a name="L53"></a><tt class="py-lineno"> 53</tt>  <tt class="py-line"><tt class="py-comment"></tt>    <tt class="py-name">nc_out</tt> <tt class="py-op">=</tt> <tt class="py-name">netCDF3</tt><tt class="py-op">.</tt><tt class="py-name">Dataset</tt><tt class="py-op">(</tt><tt class="py-name">args</tt><tt class="py-op">[</tt><tt class="py-number">2</tt><tt class="py-op">]</tt><tt class="py-op">,</tt> <tt class="py-string">'w'</tt><tt class="py-op">)</tt> </tt>
<a name="L54"></a><tt class="py-lineno"> 54</tt>  <tt class="py-line"> </tt>
<a name="L55"></a><tt class="py-lineno"> 55</tt>  <tt class="py-line">    <tt class="py-comment"># Set metadata fields of nc_out appropriate to the calculation at hand.</tt> </tt>
<a name="L56"></a><tt class="py-lineno"> 56</tt>  <tt class="py-line"><tt class="py-comment"></tt> </tt>
<a name="L57"></a><tt class="py-lineno"> 57</tt>  <tt class="py-line">    <tt class="py-comment"># - Make sure that the file complies with either COARDS or CF.</tt> </tt>
<a name="L58"></a><tt class="py-lineno"> 58</tt>  <tt class="py-line"><tt class="py-comment"></tt>    <tt class="py-comment"># - Include all of the parameters that go into doing the calculation (whatever</tt> </tt>
<a name="L59"></a><tt class="py-lineno"> 59</tt>  <tt class="py-line"><tt class="py-comment"></tt>    <tt class="py-comment">#   is listed within the .satellite and .grid files).</tt> </tt>
<a name="L60"></a><tt class="py-lineno"> 60</tt>  <tt class="py-line"><tt class="py-comment"></tt>    <tt class="py-comment"># - Make sure that the units for those parameters are clear.</tt> </tt>
<a name="L61"></a><tt class="py-lineno"> 61</tt>  <tt class="py-line"><tt class="py-comment"></tt>    <tt class="py-comment"># - A decent description of the contents of the file in English.</tt> </tt>
<a name="L62"></a><tt class="py-lineno"> 62</tt>  <tt class="py-line"><tt class="py-comment"></tt> </tt>
<a name="L63"></a><tt class="py-lineno"> 63</tt>  <tt class="py-line">    <tt class="py-comment"># Set the global data attributes of the netCDF file describing the run</tt> </tt>
<a name="L64"></a><tt class="py-lineno"> 64</tt>  <tt class="py-line"><tt class="py-comment"></tt>    <tt class="py-comment"># This allows us to re-construct the entire model run if we want to, given</tt> </tt>
<a name="L65"></a><tt class="py-lineno"> 65</tt>  <tt class="py-line"><tt class="py-comment"></tt>    <tt class="py-comment"># the SatStress library and a netCDF output file.</tt> </tt>
<a name="L66"></a><tt class="py-lineno"> 66</tt>  <tt class="py-line"><tt class="py-comment"></tt>    <tt class="py-name">nc_out</tt><tt class="py-op">.</tt><tt class="py-name">description</tt> <tt class="py-op">=</tt> <tt class="py-string">"Testing pySatStress on a regular grid"</tt> </tt>
<a name="L67"></a><tt class="py-lineno"> 67</tt>  <tt class="py-line">    <tt class="py-name">nc_out</tt><tt class="py-op">.</tt><tt class="py-name">history</tt>     <tt class="py-op">=</tt> <tt class="py-string">"Created: %s using pySatStress"</tt> <tt class="py-op">%</tt> <tt class="py-op">(</tt> <tt class="py-name">time</tt><tt class="py-op">.</tt><tt class="py-name">ctime</tt><tt class="py-op">(</tt><tt class="py-name">time</tt><tt class="py-op">.</tt><tt class="py-name">time</tt><tt class="py-op">(</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> <tt class="py-op">)</tt> </tt>
<a name="L68"></a><tt class="py-lineno"> 68</tt>  <tt class="py-line">    <tt class="py-name">nc_out</tt><tt class="py-op">.</tt><tt class="py-name">Conventions</tt> <tt class="py-op">=</tt> <tt class="py-string">"COARDS"</tt> </tt>
<a name="L69"></a><tt class="py-lineno"> 69</tt>  <tt class="py-line"> </tt>
<a name="L70"></a><tt class="py-lineno"> 70</tt>  <tt class="py-line">    <tt class="py-comment"># Specify the size and shape of the output datacube  </tt> </tt>
<a name="L71"></a><tt class="py-lineno"> 71</tt>  <tt class="py-line"><tt class="py-comment"></tt>     </tt>
<a name="L72"></a><tt class="py-lineno"> 72</tt>  <tt class="py-line">    <tt class="py-name">n_deltas</tt> <tt class="py-op">=</tt> <tt class="py-name">the_grid</tt><tt class="py-op">.</tt><tt class="py-name">nsr_delta_numsteps</tt> </tt>
<a name="L73"></a><tt class="py-lineno"> 73</tt>  <tt class="py-line">    <tt class="py-name">nc_out</tt><tt class="py-op">.</tt><tt class="py-name">createDimension</tt><tt class="py-op">(</tt><tt class="py-string">'nsr_delta'</tt><tt class="py-op">,</tt> <tt class="py-name">n_deltas</tt><tt class="py-op">)</tt> </tt>
<a name="L74"></a><tt class="py-lineno"> 74</tt>  <tt class="py-line">    <tt class="py-name">nsr_deltas</tt> <tt class="py-op">=</tt> <tt class="py-name">nc_out</tt><tt class="py-op">.</tt><tt class="py-name">createVariable</tt><tt class="py-op">(</tt><tt class="py-string">'nsr_delta'</tt><tt class="py-op">,</tt> <tt class="py-string">'f4'</tt><tt class="py-op">,</tt> <tt class="py-op">(</tt><tt class="py-string">'nsr_delta'</tt><tt class="py-op">,</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L75"></a><tt class="py-lineno"> 75</tt>  <tt class="py-line">    <tt class="py-name">nsr_deltas</tt><tt class="py-op">.</tt><tt class="py-name">units</tt> <tt class="py-op">=</tt> <tt class="py-string">""</tt> </tt>
<a name="L76"></a><tt class="py-lineno"> 76</tt>  <tt class="py-line">    <tt class="py-name">nsr_deltas</tt><tt class="py-op">.</tt><tt class="py-name">long_name</tt> <tt class="py-op">=</tt> <tt class="py-string">"NSR Surface Delta (mu/(eta*omega))"</tt> </tt>
<a name="L77"></a><tt class="py-lineno"> 77</tt>  <tt class="py-line">    <tt class="py-name">nsr_deltas</tt><tt class="py-op">[</tt><tt class="py-op">:</tt><tt class="py-op">]</tt> <tt class="py-op">=</tt> <tt class="py-name">numpy</tt><tt class="py-op">.</tt><tt class="py-name">logspace</tt><tt class="py-op">(</tt><tt class="py-name">the_grid</tt><tt class="py-op">.</tt><tt class="py-name">nsr_delta_min</tt><tt class="py-op">,</tt> <tt class="py-name">the_grid</tt><tt class="py-op">.</tt><tt class="py-name">nsr_delta_max</tt><tt class="py-op">,</tt> <tt class="py-name">num</tt><tt class="py-op">=</tt><tt class="py-name">n_deltas</tt><tt class="py-op">)</tt> </tt>
<a name="L78"></a><tt class="py-lineno"> 78</tt>  <tt class="py-line"> </tt>
<a name="L79"></a><tt class="py-lineno"> 79</tt>  <tt class="py-line">    <tt class="py-name">n_times</tt> <tt class="py-op">=</tt> <tt class="py-name">len</tt><tt class="py-op">(</tt><tt class="py-name">numpy</tt><tt class="py-op">.</tt><tt class="py-name">arange</tt><tt class="py-op">(</tt><tt class="py-name">the_grid</tt><tt class="py-op">.</tt><tt class="py-name">time_min</tt><tt class="py-op">,</tt> <tt class="py-name">the_grid</tt><tt class="py-op">.</tt><tt class="py-name">time_max</tt><tt class="py-op">,</tt> <tt class="py-name">the_grid</tt><tt class="py-op">.</tt><tt class="py-name">time_step</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L80"></a><tt class="py-lineno"> 80</tt>  <tt class="py-line">    <tt class="py-name">nc_out</tt><tt class="py-op">.</tt><tt class="py-name">createDimension</tt><tt class="py-op">(</tt><tt class="py-string">'time'</tt><tt class="py-op">,</tt> <tt class="py-name">n_times</tt><tt class="py-op">)</tt> </tt>
<a name="L81"></a><tt class="py-lineno"> 81</tt>  <tt class="py-line">    <tt class="py-name">times</tt> <tt class="py-op">=</tt> <tt class="py-name">nc_out</tt><tt class="py-op">.</tt><tt class="py-name">createVariable</tt><tt class="py-op">(</tt><tt class="py-string">'time'</tt><tt class="py-op">,</tt> <tt class="py-string">'f4'</tt><tt class="py-op">,</tt> <tt class="py-op">(</tt><tt class="py-string">'time'</tt><tt class="py-op">,</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L82"></a><tt class="py-lineno"> 82</tt>  <tt class="py-line"> </tt>
<a name="L83"></a><tt class="py-lineno"> 83</tt>  <tt class="py-line">    <tt class="py-comment"># Check to see what kind of units we're using for time,</tt> </tt>
<a name="L84"></a><tt class="py-lineno"> 84</tt>  <tt class="py-line"><tt class="py-comment"></tt>    <tt class="py-comment"># and name the variables and their units appropriately</tt> </tt>
<a name="L85"></a><tt class="py-lineno"> 85</tt>  <tt class="py-line"><tt class="py-comment"></tt>    <tt class="py-keyword">if</tt> <tt class="py-name">the_grid</tt><tt class="py-op">.</tt><tt class="py-name">orbit_min</tt> <tt class="py-keyword">is</tt> <tt class="py-name">None</tt><tt class="py-op">:</tt> </tt>
<a name="L86"></a><tt class="py-lineno"> 86</tt>  <tt class="py-line">        <tt class="py-name">times</tt><tt class="py-op">.</tt><tt class="py-name">units</tt> <tt class="py-op">=</tt> <tt class="py-string">"seconds"</tt> </tt>
<a name="L87"></a><tt class="py-lineno"> 87</tt>  <tt class="py-line">        <tt class="py-name">times</tt><tt class="py-op">.</tt><tt class="py-name">long_name</tt> <tt class="py-op">=</tt> <tt class="py-string">"time after periapse"</tt> </tt>
<a name="L88"></a><tt class="py-lineno"> 88</tt>  <tt class="py-line">        <tt class="py-name">times</tt><tt class="py-op">[</tt><tt class="py-op">:</tt><tt class="py-op">]</tt> <tt class="py-op">=</tt> <tt class="py-name">numpy</tt><tt class="py-op">.</tt><tt class="py-name">arange</tt><tt class="py-op">(</tt><tt class="py-name">the_grid</tt><tt class="py-op">.</tt><tt class="py-name">time_min</tt><tt class="py-op">,</tt> <tt class="py-name">the_grid</tt><tt class="py-op">.</tt><tt class="py-name">time_max</tt><tt class="py-op">,</tt> <tt class="py-name">the_grid</tt><tt class="py-op">.</tt><tt class="py-name">time_step</tt><tt class="py-op">)</tt> </tt>
<a name="L89"></a><tt class="py-lineno"> 89</tt>  <tt class="py-line">    <tt class="py-keyword">else</tt><tt class="py-op">:</tt> </tt>
<a name="L90"></a><tt class="py-lineno"> 90</tt>  <tt class="py-line">        <tt class="py-name">times</tt><tt class="py-op">.</tt><tt class="py-name">units</tt> <tt class="py-op">=</tt> <tt class="py-string">"degrees"</tt> </tt>
<a name="L91"></a><tt class="py-lineno"> 91</tt>  <tt class="py-line">        <tt class="py-name">times</tt><tt class="py-op">.</tt><tt class="py-name">long_name</tt> <tt class="py-op">=</tt> <tt class="py-string">"degrees after periapse"</tt> </tt>
<a name="L92"></a><tt class="py-lineno"> 92</tt>  <tt class="py-line">        <tt class="py-name">times</tt><tt class="py-op">[</tt><tt class="py-op">:</tt><tt class="py-op">]</tt> <tt class="py-op">=</tt> <tt class="py-name">numpy</tt><tt class="py-op">.</tt><tt class="py-name">arange</tt><tt class="py-op">(</tt><tt class="py-name">the_grid</tt><tt class="py-op">.</tt><tt class="py-name">orbit_min</tt><tt class="py-op">,</tt> <tt class="py-name">the_grid</tt><tt class="py-op">.</tt><tt class="py-name">orbit_max</tt><tt class="py-op">,</tt> <tt class="py-name">the_grid</tt><tt class="py-op">.</tt><tt class="py-name">orbit_step</tt><tt class="py-op">)</tt> </tt>
<a name="L93"></a><tt class="py-lineno"> 93</tt>  <tt class="py-line"> </tt>
<a name="L94"></a><tt class="py-lineno"> 94</tt>  <tt class="py-line">    <tt class="py-name">n_lats</tt> <tt class="py-op">=</tt> <tt class="py-name">len</tt><tt class="py-op">(</tt><tt class="py-name">numpy</tt><tt class="py-op">.</tt><tt class="py-name">arange</tt><tt class="py-op">(</tt><tt class="py-name">the_grid</tt><tt class="py-op">.</tt><tt class="py-name">lat_min</tt><tt class="py-op">,</tt> <tt class="py-name">the_grid</tt><tt class="py-op">.</tt><tt class="py-name">lat_max</tt><tt class="py-op">+</tt><tt class="py-name">the_grid</tt><tt class="py-op">.</tt><tt class="py-name">latlon_step</tt><tt class="py-op">,</tt> <tt class="py-name">the_grid</tt><tt class="py-op">.</tt><tt class="py-name">latlon_step</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L95"></a><tt class="py-lineno"> 95</tt>  <tt class="py-line">    <tt class="py-name">nc_out</tt><tt class="py-op">.</tt><tt class="py-name">createDimension</tt><tt class="py-op">(</tt><tt class="py-string">'latitude'</tt><tt class="py-op">,</tt>  <tt class="py-name">n_lats</tt><tt class="py-op">)</tt> </tt>
<a name="L96"></a><tt class="py-lineno"> 96</tt>  <tt class="py-line">    <tt class="py-name">lats</tt> <tt class="py-op">=</tt> <tt class="py-name">nc_out</tt><tt class="py-op">.</tt><tt class="py-name">createVariable</tt><tt class="py-op">(</tt><tt class="py-string">'latitude'</tt><tt class="py-op">,</tt>  <tt class="py-string">'f4'</tt><tt class="py-op">,</tt> <tt class="py-op">(</tt><tt class="py-string">'latitude'</tt><tt class="py-op">,</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L97"></a><tt class="py-lineno"> 97</tt>  <tt class="py-line">    <tt class="py-name">lats</tt><tt class="py-op">.</tt><tt class="py-name">units</tt> <tt class="py-op">=</tt> <tt class="py-string">"degrees_north"</tt> </tt>
<a name="L98"></a><tt class="py-lineno"> 98</tt>  <tt class="py-line">    <tt class="py-name">lats</tt><tt class="py-op">.</tt><tt class="py-name">long_name</tt> <tt class="py-op">=</tt> <tt class="py-string">"latitude"</tt> </tt>
<a name="L99"></a><tt class="py-lineno"> 99</tt>  <tt class="py-line">    <tt class="py-name">lats</tt><tt class="py-op">[</tt><tt class="py-op">:</tt><tt class="py-op">]</tt> <tt class="py-op">=</tt> <tt class="py-name">numpy</tt><tt class="py-op">.</tt><tt class="py-name">arange</tt><tt class="py-op">(</tt><tt class="py-name">the_grid</tt><tt class="py-op">.</tt><tt class="py-name">lat_min</tt><tt class="py-op">,</tt> <tt class="py-name">the_grid</tt><tt class="py-op">.</tt><tt class="py-name">lat_max</tt>  <tt class="py-op">+</tt> <tt class="py-op">(</tt><tt class="py-name">the_grid</tt><tt class="py-op">.</tt><tt class="py-name">latlon_step</tt><tt class="py-op">/</tt><tt class="py-number">2.0</tt><tt class="py-op">)</tt><tt class="py-op">,</tt> <tt class="py-name">the_grid</tt><tt class="py-op">.</tt><tt class="py-name">latlon_step</tt><tt class="py-op">)</tt> </tt>
<a name="L100"></a><tt class="py-lineno">100</tt>  <tt class="py-line"> </tt>
<a name="L101"></a><tt class="py-lineno">101</tt>  <tt class="py-line">    <tt class="py-name">n_lons</tt> <tt class="py-op">=</tt> <tt class="py-name">len</tt><tt class="py-op">(</tt><tt class="py-name">numpy</tt><tt class="py-op">.</tt><tt class="py-name">arange</tt><tt class="py-op">(</tt><tt class="py-name">the_grid</tt><tt class="py-op">.</tt><tt class="py-name">lon_min</tt><tt class="py-op">,</tt> <tt class="py-name">the_grid</tt><tt class="py-op">.</tt><tt class="py-name">lon_max</tt><tt class="py-op">+</tt><tt class="py-name">the_grid</tt><tt class="py-op">.</tt><tt class="py-name">latlon_step</tt><tt class="py-op">,</tt> <tt class="py-name">the_grid</tt><tt class="py-op">.</tt><tt class="py-name">latlon_step</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L102"></a><tt class="py-lineno">102</tt>  <tt class="py-line">    <tt class="py-name">nc_out</tt><tt class="py-op">.</tt><tt class="py-name">createDimension</tt><tt class="py-op">(</tt><tt class="py-string">'longitude'</tt><tt class="py-op">,</tt> <tt class="py-name">n_lons</tt><tt class="py-op">)</tt> </tt>
<a name="L103"></a><tt class="py-lineno">103</tt>  <tt class="py-line">    <tt class="py-name">lons</tt> <tt class="py-op">=</tt> <tt class="py-name">nc_out</tt><tt class="py-op">.</tt><tt class="py-name">createVariable</tt><tt class="py-op">(</tt><tt class="py-string">'longitude'</tt><tt class="py-op">,</tt>  <tt class="py-string">'f4'</tt><tt class="py-op">,</tt> <tt class="py-op">(</tt><tt class="py-string">'longitude'</tt><tt class="py-op">,</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L104"></a><tt class="py-lineno">104</tt>  <tt class="py-line">    <tt class="py-name">lons</tt><tt class="py-op">.</tt><tt class="py-name">units</tt> <tt class="py-op">=</tt> <tt class="py-string">"degrees_east"</tt> </tt>
<a name="L105"></a><tt class="py-lineno">105</tt>  <tt class="py-line">    <tt class="py-name">lons</tt><tt class="py-op">.</tt><tt class="py-name">long_name</tt> <tt class="py-op">=</tt> <tt class="py-string">"longitude"</tt> </tt>
<a name="L106"></a><tt class="py-lineno">106</tt>  <tt class="py-line">    <tt class="py-name">lons</tt><tt class="py-op">[</tt><tt class="py-op">:</tt><tt class="py-op">]</tt> <tt class="py-op">=</tt> <tt class="py-name">numpy</tt><tt class="py-op">.</tt><tt class="py-name">arange</tt><tt class="py-op">(</tt><tt class="py-name">the_grid</tt><tt class="py-op">.</tt><tt class="py-name">lon_min</tt><tt class="py-op">,</tt> <tt class="py-name">the_grid</tt><tt class="py-op">.</tt><tt class="py-name">lon_max</tt>  <tt class="py-op">+</tt> <tt class="py-op">(</tt><tt class="py-name">the_grid</tt><tt class="py-op">.</tt><tt class="py-name">latlon_step</tt><tt class="py-op">/</tt><tt class="py-number">2.0</tt><tt class="py-op">)</tt><tt class="py-op">,</tt> <tt class="py-name">the_grid</tt><tt class="py-op">.</tt><tt class="py-name">latlon_step</tt><tt class="py-op">)</tt> </tt>
<a name="L107"></a><tt class="py-lineno">107</tt>  <tt class="py-line">    <tt class="py-comment">#  end dimension and coordinate variable definitions</tt> </tt>
<a name="L108"></a><tt class="py-lineno">108</tt>  <tt class="py-line"><tt class="py-comment"></tt> </tt>
<a name="L109"></a><tt class="py-lineno">109</tt>  <tt class="py-line">    <tt class="py-comment"># Define the data variables </tt> </tt>
<a name="L110"></a><tt class="py-lineno">110</tt>  <tt class="py-line"><tt class="py-comment"></tt>    <tt class="py-name">Ttt_D</tt> <tt class="py-op">=</tt> <tt class="py-name">nc_out</tt><tt class="py-op">.</tt><tt class="py-name">createVariable</tt><tt class="py-op">(</tt><tt class="py-string">'Ttt_D'</tt><tt class="py-op">,</tt> <tt class="py-string">'f4'</tt><tt class="py-op">,</tt> <tt class="py-op">(</tt><tt class="py-string">'time'</tt><tt class="py-op">,</tt> <tt class="py-string">'latitude'</tt><tt class="py-op">,</tt> <tt class="py-string">'longitude'</tt><tt class="py-op">,</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L111"></a><tt class="py-lineno">111</tt>  <tt class="py-line">    <tt class="py-name">Ttt_D</tt><tt class="py-op">.</tt><tt class="py-name">units</tt> <tt class="py-op">=</tt> <tt class="py-string">"Pa"</tt> </tt>
<a name="L112"></a><tt class="py-lineno">112</tt>  <tt class="py-line">    <tt class="py-name">Ttt_D</tt><tt class="py-op">.</tt><tt class="py-name">long_name</tt> <tt class="py-op">=</tt> <tt class="py-string">"north-south component stress of Diurnal stresses"</tt> </tt>
<a name="L113"></a><tt class="py-lineno">113</tt>  <tt class="py-line"> </tt>
<a name="L114"></a><tt class="py-lineno">114</tt>  <tt class="py-line">    <tt class="py-name">Tpt_D</tt> <tt class="py-op">=</tt> <tt class="py-name">nc_out</tt><tt class="py-op">.</tt><tt class="py-name">createVariable</tt><tt class="py-op">(</tt><tt class="py-string">'Tpt_D'</tt><tt class="py-op">,</tt> <tt class="py-string">'f4'</tt><tt class="py-op">,</tt> <tt class="py-op">(</tt><tt class="py-string">'time'</tt><tt class="py-op">,</tt> <tt class="py-string">'latitude'</tt><tt class="py-op">,</tt> <tt class="py-string">'longitude'</tt><tt class="py-op">,</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L115"></a><tt class="py-lineno">115</tt>  <tt class="py-line">    <tt class="py-name">Tpt_D</tt><tt class="py-op">.</tt><tt class="py-name">units</tt> <tt class="py-op">=</tt> <tt class="py-string">"Pa"</tt> </tt>
<a name="L116"></a><tt class="py-lineno">116</tt>  <tt class="py-line">    <tt class="py-name">Tpt_D</tt><tt class="py-op">.</tt><tt class="py-name">long_name</tt> <tt class="py-op">=</tt> <tt class="py-string">"shear component of Diurnal stresses"</tt> </tt>
<a name="L117"></a><tt class="py-lineno">117</tt>  <tt class="py-line"> </tt>
<a name="L118"></a><tt class="py-lineno">118</tt>  <tt class="py-line">    <tt class="py-name">Tpp_D</tt> <tt class="py-op">=</tt> <tt class="py-name">nc_out</tt><tt class="py-op">.</tt><tt class="py-name">createVariable</tt><tt class="py-op">(</tt><tt class="py-string">'Tpp_D'</tt><tt class="py-op">,</tt> <tt class="py-string">'f4'</tt><tt class="py-op">,</tt> <tt class="py-op">(</tt><tt class="py-string">'time'</tt><tt class="py-op">,</tt> <tt class="py-string">'latitude'</tt><tt class="py-op">,</tt> <tt class="py-string">'longitude'</tt><tt class="py-op">,</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L119"></a><tt class="py-lineno">119</tt>  <tt class="py-line">    <tt class="py-name">Tpp_D</tt><tt class="py-op">.</tt><tt class="py-name">units</tt> <tt class="py-op">=</tt> <tt class="py-string">"Pa"</tt> </tt>
<a name="L120"></a><tt class="py-lineno">120</tt>  <tt class="py-line">    <tt class="py-name">Tpp_D</tt><tt class="py-op">.</tt><tt class="py-name">long_name</tt> <tt class="py-op">=</tt> <tt class="py-string">"east-west component of Diurnal stresses"</tt> </tt>
<a name="L121"></a><tt class="py-lineno">121</tt>  <tt class="py-line"> </tt>
<a name="L122"></a><tt class="py-lineno">122</tt>  <tt class="py-line">    <tt class="py-name">Ttt_N</tt> <tt class="py-op">=</tt> <tt class="py-name">nc_out</tt><tt class="py-op">.</tt><tt class="py-name">createVariable</tt><tt class="py-op">(</tt><tt class="py-string">'Ttt_N'</tt><tt class="py-op">,</tt> <tt class="py-string">'f4'</tt><tt class="py-op">,</tt> <tt class="py-op">(</tt><tt class="py-string">'nsr_delta'</tt><tt class="py-op">,</tt> <tt class="py-string">'latitude'</tt><tt class="py-op">,</tt> <tt class="py-string">'longitude'</tt><tt class="py-op">,</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L123"></a><tt class="py-lineno">123</tt>  <tt class="py-line">    <tt class="py-name">Ttt_N</tt><tt class="py-op">.</tt><tt class="py-name">units</tt> <tt class="py-op">=</tt> <tt class="py-string">"Pa"</tt> </tt>
<a name="L124"></a><tt class="py-lineno">124</tt>  <tt class="py-line">    <tt class="py-name">Ttt_N</tt><tt class="py-op">.</tt><tt class="py-name">long_name</tt> <tt class="py-op">=</tt> <tt class="py-string">"north-south component of NSR stresses"</tt> </tt>
<a name="L125"></a><tt class="py-lineno">125</tt>  <tt class="py-line"> </tt>
<a name="L126"></a><tt class="py-lineno">126</tt>  <tt class="py-line">    <tt class="py-name">Tpt_N</tt> <tt class="py-op">=</tt> <tt class="py-name">nc_out</tt><tt class="py-op">.</tt><tt class="py-name">createVariable</tt><tt class="py-op">(</tt><tt class="py-string">'Tpt_N'</tt><tt class="py-op">,</tt> <tt class="py-string">'f4'</tt><tt class="py-op">,</tt> <tt class="py-op">(</tt><tt class="py-string">'nsr_delta'</tt><tt class="py-op">,</tt> <tt class="py-string">'latitude'</tt><tt class="py-op">,</tt> <tt class="py-string">'longitude'</tt><tt class="py-op">,</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L127"></a><tt class="py-lineno">127</tt>  <tt class="py-line">    <tt class="py-name">Tpt_N</tt><tt class="py-op">.</tt><tt class="py-name">units</tt> <tt class="py-op">=</tt> <tt class="py-string">"Pa"</tt> </tt>
<a name="L128"></a><tt class="py-lineno">128</tt>  <tt class="py-line">    <tt class="py-name">Tpt_N</tt><tt class="py-op">.</tt><tt class="py-name">long_name</tt> <tt class="py-op">=</tt> <tt class="py-string">"shear component of NSR stresses"</tt> </tt>
<a name="L129"></a><tt class="py-lineno">129</tt>  <tt class="py-line"> </tt>
<a name="L130"></a><tt class="py-lineno">130</tt>  <tt class="py-line">    <tt class="py-name">Tpp_N</tt> <tt class="py-op">=</tt> <tt class="py-name">nc_out</tt><tt class="py-op">.</tt><tt class="py-name">createVariable</tt><tt class="py-op">(</tt><tt class="py-string">'Tpp_N'</tt><tt class="py-op">,</tt> <tt class="py-string">'f4'</tt><tt class="py-op">,</tt> <tt class="py-op">(</tt><tt class="py-string">'nsr_delta'</tt><tt class="py-op">,</tt> <tt class="py-string">'latitude'</tt><tt class="py-op">,</tt> <tt class="py-string">'longitude'</tt><tt class="py-op">,</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L131"></a><tt class="py-lineno">131</tt>  <tt class="py-line">    <tt class="py-name">Tpp_N</tt><tt class="py-op">.</tt><tt class="py-name">units</tt> <tt class="py-op">=</tt> <tt class="py-string">"Pa"</tt> </tt>
<a name="L132"></a><tt class="py-lineno">132</tt>  <tt class="py-line">    <tt class="py-name">Tpp_N</tt><tt class="py-op">.</tt><tt class="py-name">long_name</tt> <tt class="py-op">=</tt> <tt class="py-string">"east-west component of NSR stresses"</tt> </tt>
<a name="L133"></a><tt class="py-lineno">133</tt>  <tt class="py-line">    <tt class="py-comment">#  end data variable definitions</tt> </tt>
<a name="L134"></a><tt class="py-lineno">134</tt>  <tt class="py-line"><tt class="py-comment"></tt> </tt>
<a name="L135"></a><tt class="py-lineno">135</tt>  <tt class="py-line">    <tt class="py-comment"># Loop over the time variable, doing diurnal calculations over an orbit  </tt> </tt>
<a name="L136"></a><tt class="py-lineno">136</tt>  <tt class="py-line"><tt class="py-comment"></tt>    <tt class="py-keyword">for</tt> <tt class="py-name">t</tt> <tt class="py-keyword">in</tt> <tt class="py-name">range</tt><tt class="py-op">(</tt><tt class="py-name">n_times</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
<a name="L137"></a><tt class="py-lineno">137</tt>  <tt class="py-line">        <tt class="py-comment"># We need some kind of progress update, and we need to make sure that</tt> </tt>
<a name="L138"></a><tt class="py-lineno">138</tt>  <tt class="py-line"><tt class="py-comment"></tt>        <tt class="py-comment"># we have a representation of the time coordinate in seconds, because</tt> </tt>
<a name="L139"></a><tt class="py-lineno">139</tt>  <tt class="py-line"><tt class="py-comment"></tt>        <tt class="py-comment"># that's what the SatStress library expects - even if we're ultimately</tt> </tt>
<a name="L140"></a><tt class="py-lineno">140</tt>  <tt class="py-line"><tt class="py-comment"></tt>        <tt class="py-comment"># communicating time to the user in terms of "degrees after periapse"</tt> </tt>
<a name="L141"></a><tt class="py-lineno">141</tt>  <tt class="py-line"><tt class="py-comment"></tt>        <tt class="py-keyword">if</tt> <tt class="py-name">the_grid</tt><tt class="py-op">.</tt><tt class="py-name">orbit_min</tt> <tt class="py-keyword">is</tt> <tt class="py-name">None</tt><tt class="py-op">:</tt> </tt>
<a name="L142"></a><tt class="py-lineno">142</tt>  <tt class="py-line">            <tt class="py-name">time_sec</tt> <tt class="py-op">=</tt> <tt class="py-name">times</tt><tt class="py-op">[</tt><tt class="py-name">t</tt><tt class="py-op">]</tt> </tt>
<a name="L143"></a><tt class="py-lineno">143</tt>  <tt class="py-line">        <tt class="py-keyword">else</tt><tt class="py-op">:</tt> </tt>
<a name="L144"></a><tt class="py-lineno">144</tt>  <tt class="py-line">            <tt class="py-name">time_sec</tt> <tt class="py-op">=</tt> <tt class="py-name">the_sat</tt><tt class="py-op">.</tt><tt id="link-8" class="py-name" targets="Method SatStress.SatStress.Satellite.orbit_period()=SatStress.SatStress.Satellite-class.html#orbit_period"><a title="SatStress.SatStress.Satellite.orbit_period" class="py-name" href="#" onclick="return doclink('link-8', 'orbit_period', 'link-8');">orbit_period</a></tt><tt class="py-op">(</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-op">(</tt><tt class="py-name">times</tt><tt class="py-op">[</tt><tt class="py-name">t</tt><tt class="py-op">]</tt><tt class="py-op">/</tt><tt class="py-number">360.0</tt><tt class="py-op">)</tt> </tt>
<a name="L145"></a><tt class="py-lineno">145</tt>  <tt class="py-line"> </tt>
<a name="L146"></a><tt class="py-lineno">146</tt>  <tt class="py-line">        <tt class="py-keyword">print</tt> <tt class="py-string">"Calculating diurnal stresses at"</tt><tt class="py-op">,</tt> <tt class="py-name">times</tt><tt class="py-op">[</tt><tt class="py-name">t</tt><tt class="py-op">]</tt><tt class="py-op">,</tt> <tt class="py-name">times</tt><tt class="py-op">.</tt><tt class="py-name">long_name</tt> </tt>
<a name="L147"></a><tt class="py-lineno">147</tt>  <tt class="py-line">        <tt class="py-keyword">for</tt> <tt class="py-name">lon</tt> <tt class="py-keyword">in</tt> <tt class="py-name">range</tt><tt class="py-op">(</tt><tt class="py-name">n_lons</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
<a name="L148"></a><tt class="py-lineno">148</tt>  <tt class="py-line">            <tt class="py-keyword">for</tt> <tt class="py-name">lat</tt> <tt class="py-keyword">in</tt> <tt class="py-name">range</tt><tt class="py-op">(</tt><tt class="py-name">n_lats</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
<a name="L149"></a><tt class="py-lineno">149</tt>  <tt class="py-line"> </tt>
<a name="L150"></a><tt class="py-lineno">150</tt>  <tt class="py-line">                <tt class="py-name">Tau_D</tt> <tt class="py-op">=</tt> <tt class="py-name">diurnal_stress</tt><tt class="py-op">.</tt><tt id="link-9" class="py-name" targets="Method SatStress.SatStress.StressCalc.tensor()=SatStress.SatStress.StressCalc-class.html#tensor"><a title="SatStress.SatStress.StressCalc.tensor" class="py-name" href="#" onclick="return doclink('link-9', 'tensor', 'link-9');">tensor</a></tt><tt class="py-op">(</tt><tt class="py-name">theta</tt> <tt class="py-op">=</tt> <tt class="py-name">scipy</tt><tt class="py-op">.</tt><tt class="py-name">radians</tt><tt class="py-op">(</tt><tt class="py-number">90.0</tt><tt class="py-op">-</tt><tt class="py-name">lats</tt><tt class="py-op">[</tt><tt class="py-name">lat</tt><tt class="py-op">]</tt><tt class="py-op">)</tt><tt class="py-op">,</tt>\ </tt>
<a name="L151"></a><tt class="py-lineno">151</tt>  <tt class="py-line">                                                <tt class="py-name">phi</tt> <tt class="py-op">=</tt> <tt class="py-name">scipy</tt><tt class="py-op">.</tt><tt class="py-name">radians</tt><tt class="py-op">(</tt><tt class="py-name">lons</tt><tt class="py-op">[</tt><tt class="py-name">lon</tt><tt class="py-op">]</tt><tt class="py-op">)</tt><tt class="py-op">,</tt>\ </tt>
<a name="L152"></a><tt class="py-lineno">152</tt>  <tt class="py-line">                                                  <tt class="py-name">t</tt> <tt class="py-op">=</tt> <tt class="py-name">time_sec</tt> <tt class="py-op">)</tt> </tt>
<a name="L153"></a><tt class="py-lineno">153</tt>  <tt class="py-line"> </tt>
<a name="L154"></a><tt class="py-lineno">154</tt>  <tt class="py-line">                <tt class="py-name">nc_out</tt><tt class="py-op">.</tt><tt class="py-name">variables</tt><tt class="py-op">[</tt><tt class="py-string">'Ttt_D'</tt><tt class="py-op">]</tt><tt class="py-op">[</tt><tt class="py-name">t</tt><tt class="py-op">,</tt><tt class="py-name">lat</tt><tt class="py-op">,</tt><tt class="py-name">lon</tt><tt class="py-op">]</tt> <tt class="py-op">=</tt> <tt class="py-name">Tau_D</tt><tt class="py-op">[</tt><tt class="py-number">0</tt><tt class="py-op">,</tt><tt class="py-number">0</tt><tt class="py-op">]</tt> </tt>
<a name="L155"></a><tt class="py-lineno">155</tt>  <tt class="py-line">                <tt class="py-name">nc_out</tt><tt class="py-op">.</tt><tt class="py-name">variables</tt><tt class="py-op">[</tt><tt class="py-string">'Tpt_D'</tt><tt class="py-op">]</tt><tt class="py-op">[</tt><tt class="py-name">t</tt><tt class="py-op">,</tt><tt class="py-name">lat</tt><tt class="py-op">,</tt><tt class="py-name">lon</tt><tt class="py-op">]</tt> <tt class="py-op">=</tt> <tt class="py-name">Tau_D</tt><tt class="py-op">[</tt><tt class="py-number">1</tt><tt class="py-op">,</tt><tt class="py-number">0</tt><tt class="py-op">]</tt> </tt>
<a name="L156"></a><tt class="py-lineno">156</tt>  <tt class="py-line">                <tt class="py-name">nc_out</tt><tt class="py-op">.</tt><tt class="py-name">variables</tt><tt class="py-op">[</tt><tt class="py-string">'Tpp_D'</tt><tt class="py-op">]</tt><tt class="py-op">[</tt><tt class="py-name">t</tt><tt class="py-op">,</tt><tt class="py-name">lat</tt><tt class="py-op">,</tt><tt class="py-name">lon</tt><tt class="py-op">]</tt> <tt class="py-op">=</tt> <tt class="py-name">Tau_D</tt><tt class="py-op">[</tt><tt class="py-number">1</tt><tt class="py-op">,</tt><tt class="py-number">1</tt><tt class="py-op">]</tt>  </tt>
<a name="L157"></a><tt class="py-lineno">157</tt>  <tt class="py-line">                <tt class="py-comment"># Not doing the principal components in this app... but save for later.</tt> </tt>
<a name="L158"></a><tt class="py-lineno">158</tt>  <tt class="py-line"><tt class="py-comment"></tt>                <tt class="py-comment">#(magA, magB), eigenvecs = linalg.eigh(Tau_D)</tt> </tt>
<a name="L159"></a><tt class="py-lineno">159</tt>  <tt class="py-line"><tt class="py-comment"></tt>                <tt class="py-comment">#mag1_D[t,lat,lon], mag2_D[t,lat,lon] = max(magA, magB), min(magA, magB)</tt> </tt>
<a name="L160"></a><tt class="py-lineno">160</tt>  <tt class="py-line"><tt class="py-comment"></tt> </tt>
<a name="L161"></a><tt class="py-lineno">161</tt>  <tt class="py-line">    <tt class="py-comment"># Make sure everything gets written out to the file.</tt> </tt>
<a name="L162"></a><tt class="py-lineno">162</tt>  <tt class="py-line"><tt class="py-comment"></tt>    <tt class="py-name">nc_out</tt><tt class="py-op">.</tt><tt class="py-name">sync</tt><tt class="py-op">(</tt><tt class="py-op">)</tt> </tt>
<a name="L163"></a><tt class="py-lineno">163</tt>  <tt class="py-line">    <tt class="py-comment">#  end Diurnal calculations</tt> </tt>
<a name="L164"></a><tt class="py-lineno">164</tt>  <tt class="py-line"><tt class="py-comment"></tt> </tt>
<a name="L165"></a><tt class="py-lineno">165</tt>  <tt class="py-line">    <tt class="py-comment"># Begin the NSR calculations: </tt> </tt>
<a name="L166"></a><tt class="py-lineno">166</tt>  <tt class="py-line"><tt class="py-comment"></tt>    <tt class="py-keyword">for</tt> <tt class="py-name">delta</tt> <tt class="py-keyword">in</tt> <tt class="py-name">range</tt><tt class="py-op">(</tt><tt class="py-name">n_deltas</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
<a name="L167"></a><tt class="py-lineno">167</tt>  <tt class="py-line">        <tt class="py-comment"># Set the nsr_period such that it corresponds to the current value of Delta:</tt> </tt>
<a name="L168"></a><tt class="py-lineno">168</tt>  <tt class="py-line"><tt class="py-comment"></tt>        <tt class="py-name">the_sat</tt><tt class="py-op">.</tt><tt class="py-name">nsr_period</tt> <tt class="py-op">=</tt> <tt class="py-number">4</tt><tt class="py-op">*</tt><tt class="py-name">numpy</tt><tt class="py-op">.</tt><tt class="py-name">pi</tt><tt class="py-op">*</tt><tt class="py-name">nsr_deltas</tt><tt class="py-op">[</tt><tt class="py-name">delta</tt><tt class="py-op">]</tt><tt class="py-op">*</tt><tt class="py-name">the_sat</tt><tt class="py-op">.</tt><tt class="py-name">layers</tt><tt class="py-op">[</tt><tt class="py-op">-</tt><tt class="py-number">1</tt><tt class="py-op">]</tt><tt class="py-op">.</tt><tt class="py-name">viscosity</tt><tt class="py-op">/</tt><tt class="py-name">the_sat</tt><tt class="py-op">.</tt><tt class="py-name">layers</tt><tt class="py-op">[</tt><tt class="py-op">-</tt><tt class="py-number">1</tt><tt class="py-op">]</tt><tt class="py-op">.</tt><tt class="py-name">lame_mu</tt> </tt>
<a name="L169"></a><tt class="py-lineno">169</tt>  <tt class="py-line">        <tt class="py-comment"># Re-set the StressCalc object based on the new nsr_period:</tt> </tt>
<a name="L170"></a><tt class="py-lineno">170</tt>  <tt class="py-line"><tt class="py-comment"></tt>        <tt class="py-name">nsr_stress</tt> <tt class="py-op">=</tt> <tt class="py-name">SS</tt><tt class="py-op">.</tt><tt id="link-10" class="py-name"><a title="SatStress.SatStress.StressCalc" class="py-name" href="#" onclick="return doclink('link-10', 'StressCalc', 'link-4');">StressCalc</a></tt><tt class="py-op">(</tt><tt class="py-op">[</tt><tt class="py-name">SS</tt><tt class="py-op">.</tt><tt id="link-11" class="py-name"><a title="SatStress.SatStress.NSR" class="py-name" href="#" onclick="return doclink('link-11', 'NSR', 'link-7');">NSR</a></tt><tt class="py-op">(</tt><tt class="py-name">the_sat</tt><tt class="py-op">)</tt><tt class="py-op">,</tt><tt class="py-op">]</tt><tt class="py-op">)</tt> </tt>
<a name="L171"></a><tt class="py-lineno">171</tt>  <tt class="py-line">        <tt class="py-comment"># We need some kind of progress update...</tt> </tt>
<a name="L172"></a><tt class="py-lineno">172</tt>  <tt class="py-line"><tt class="py-comment"></tt>        <tt class="py-keyword">print</tt> <tt class="py-string">"Calculating NSR stresses at Delta ="</tt><tt class="py-op">,</tt> <tt class="py-name">nsr_deltas</tt><tt class="py-op">[</tt><tt class="py-name">delta</tt><tt class="py-op">]</tt><tt class="py-op">,</tt> <tt class="py-string">"(P_nsr = %g yr)"</tt> <tt class="py-op">%</tt> <tt class="py-op">(</tt><tt class="py-name">the_sat</tt><tt class="py-op">.</tt><tt class="py-name">nsr_period</tt><tt class="py-op">/</tt><tt class="py-number">31556926</tt><tt class="py-op">)</tt> </tt>
<a name="L173"></a><tt class="py-lineno">173</tt>  <tt class="py-line">        <tt class="py-keyword">for</tt> <tt class="py-name">lon</tt> <tt class="py-keyword">in</tt> <tt class="py-name">range</tt><tt class="py-op">(</tt><tt class="py-name">n_lons</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
<a name="L174"></a><tt class="py-lineno">174</tt>  <tt class="py-line">            <tt class="py-keyword">for</tt> <tt class="py-name">lat</tt> <tt class="py-keyword">in</tt> <tt class="py-name">range</tt><tt class="py-op">(</tt><tt class="py-name">n_lats</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
<a name="L175"></a><tt class="py-lineno">175</tt>  <tt class="py-line"> </tt>
<a name="L176"></a><tt class="py-lineno">176</tt>  <tt class="py-line">                <tt class="py-comment"># Note that t is always zero, because in the NSR potential, all time</tt> </tt>
<a name="L177"></a><tt class="py-lineno">177</tt>  <tt class="py-line"><tt class="py-comment"></tt>                <tt class="py-comment"># does is translate surface features through the field, and here we're</tt> </tt>
<a name="L178"></a><tt class="py-lineno">178</tt>  <tt class="py-line"><tt class="py-comment"></tt>                <tt class="py-comment"># actually not interested in what the surface features are doing - we</tt> </tt>
<a name="L179"></a><tt class="py-lineno">179</tt>  <tt class="py-line"><tt class="py-comment"></tt>                <tt class="py-comment"># just want to know what the stresses look like relative to a fixed </tt> </tt>
<a name="L180"></a><tt class="py-lineno">180</tt>  <tt class="py-line"><tt class="py-comment"></tt>                <tt class="py-comment"># longitude (relative to the planet's location in the satellite's sky)</tt> </tt>
<a name="L181"></a><tt class="py-lineno">181</tt>  <tt class="py-line"><tt class="py-comment"></tt>                <tt class="py-comment"># There's more discussion of this issue in Wahr et al. (2008).</tt> </tt>
<a name="L182"></a><tt class="py-lineno">182</tt>  <tt class="py-line"><tt class="py-comment"></tt>                <tt class="py-name">Tau_N</tt> <tt class="py-op">=</tt> <tt class="py-name">nsr_stress</tt><tt class="py-op">.</tt><tt id="link-12" class="py-name"><a title="SatStress.SatStress.StressCalc.tensor" class="py-name" href="#" onclick="return doclink('link-12', 'tensor', 'link-9');">tensor</a></tt><tt class="py-op">(</tt><tt class="py-name">theta</tt> <tt class="py-op">=</tt> <tt class="py-name">scipy</tt><tt class="py-op">.</tt><tt class="py-name">radians</tt><tt class="py-op">(</tt><tt class="py-number">90.0</tt><tt class="py-op">-</tt><tt class="py-name">lats</tt><tt class="py-op">[</tt><tt class="py-name">lat</tt><tt class="py-op">]</tt><tt class="py-op">)</tt><tt class="py-op">,</tt>\ </tt>
<a name="L183"></a><tt class="py-lineno">183</tt>  <tt class="py-line">                                            <tt class="py-name">phi</tt> <tt class="py-op">=</tt> <tt class="py-name">scipy</tt><tt class="py-op">.</tt><tt class="py-name">radians</tt><tt class="py-op">(</tt><tt class="py-name">lons</tt><tt class="py-op">[</tt><tt class="py-name">lon</tt><tt class="py-op">]</tt><tt class="py-op">)</tt><tt class="py-op">,</tt>\ </tt>
<a name="L184"></a><tt class="py-lineno">184</tt>  <tt class="py-line">                                              <tt class="py-name">t</tt> <tt class="py-op">=</tt> <tt class="py-number">0</tt><tt class="py-op">)</tt> </tt>
<a name="L185"></a><tt class="py-lineno">185</tt>  <tt class="py-line"> </tt>
<a name="L186"></a><tt class="py-lineno">186</tt>  <tt class="py-line">                <tt class="py-name">nc_out</tt><tt class="py-op">.</tt><tt class="py-name">variables</tt><tt class="py-op">[</tt><tt class="py-string">'Ttt_N'</tt><tt class="py-op">]</tt><tt class="py-op">[</tt><tt class="py-name">delta</tt><tt class="py-op">,</tt><tt class="py-name">lat</tt><tt class="py-op">,</tt><tt class="py-name">lon</tt><tt class="py-op">]</tt> <tt class="py-op">=</tt> <tt class="py-name">Tau_N</tt><tt class="py-op">[</tt><tt class="py-number">0</tt><tt class="py-op">,</tt><tt class="py-number">0</tt><tt class="py-op">]</tt> </tt>
<a name="L187"></a><tt class="py-lineno">187</tt>  <tt class="py-line">                <tt class="py-name">nc_out</tt><tt class="py-op">.</tt><tt class="py-name">variables</tt><tt class="py-op">[</tt><tt class="py-string">'Tpt_N'</tt><tt class="py-op">]</tt><tt class="py-op">[</tt><tt class="py-name">delta</tt><tt class="py-op">,</tt><tt class="py-name">lat</tt><tt class="py-op">,</tt><tt class="py-name">lon</tt><tt class="py-op">]</tt> <tt class="py-op">=</tt> <tt class="py-name">Tau_N</tt><tt class="py-op">[</tt><tt class="py-number">1</tt><tt class="py-op">,</tt><tt class="py-number">0</tt><tt class="py-op">]</tt> </tt>
<a name="L188"></a><tt class="py-lineno">188</tt>  <tt class="py-line">                <tt class="py-name">nc_out</tt><tt class="py-op">.</tt><tt class="py-name">variables</tt><tt class="py-op">[</tt><tt class="py-string">'Tpp_N'</tt><tt class="py-op">]</tt><tt class="py-op">[</tt><tt class="py-name">delta</tt><tt class="py-op">,</tt><tt class="py-name">lat</tt><tt class="py-op">,</tt><tt class="py-name">lon</tt><tt class="py-op">]</tt> <tt class="py-op">=</tt> <tt class="py-name">Tau_N</tt><tt class="py-op">[</tt><tt class="py-number">1</tt><tt class="py-op">,</tt><tt class="py-number">1</tt><tt class="py-op">]</tt>  </tt>
<a name="L189"></a><tt class="py-lineno">189</tt>  <tt class="py-line"> </tt>
<a name="L190"></a><tt class="py-lineno">190</tt>  <tt class="py-line">                <tt class="py-comment"># Not doing the principal components in this app... but save for later.</tt> </tt>
<a name="L191"></a><tt class="py-lineno">191</tt>  <tt class="py-line"><tt class="py-comment"></tt>                <tt class="py-comment">#(magA, magB), eigenvecs = linalg.eigh(Tau_N)</tt> </tt>
<a name="L192"></a><tt class="py-lineno">192</tt>  <tt class="py-line"><tt class="py-comment"></tt>                <tt class="py-comment">#mag1_N[delta,lat,lon], mag2_N[delta,lat,lon] = max(magA, magB), min(magA, magB)</tt> </tt>
<a name="L193"></a><tt class="py-lineno">193</tt>  <tt class="py-line"><tt class="py-comment"></tt> </tt>
<a name="L194"></a><tt class="py-lineno">194</tt>  <tt class="py-line">        <tt class="py-comment"># re-set the NSR period to correspond to the next value of Delta...</tt> </tt>
<a name="L195"></a><tt class="py-lineno">195</tt>  <tt class="py-line"><tt class="py-comment"></tt> </tt>
<a name="L196"></a><tt class="py-lineno">196</tt>  <tt class="py-line">    <tt class="py-comment">#  end NSR calculation loop.</tt> </tt>
<a name="L197"></a><tt class="py-lineno">197</tt>  <tt class="py-line"><tt class="py-comment"></tt>     </tt>
<a name="L198"></a><tt class="py-lineno">198</tt>  <tt class="py-line">    <tt class="py-comment"># Make sure everything gets written out to the file.</tt> </tt>
<a name="L199"></a><tt class="py-lineno">199</tt>  <tt class="py-line"><tt class="py-comment"></tt>    <tt class="py-name">nc_out</tt><tt class="py-op">.</tt><tt class="py-name">sync</tt><tt class="py-op">(</tt><tt class="py-op">)</tt> </tt>
</div><a name="L200"></a><tt class="py-lineno">200</tt>  <tt class="py-line"> </tt>
<a name="L201"></a><tt class="py-lineno">201</tt>  <tt class="py-line"><tt class="py-comment"># end main()</tt> </tt>
<a name="L202"></a><tt class="py-lineno">202</tt>  <tt class="py-line"><tt class="py-comment"></tt> </tt>
<a name="Grid"></a><div id="Grid-def"><a name="L203"></a><tt class="py-lineno">203</tt> <a class="py-toggle" href="#" id="Grid-toggle" onclick="return toggle('Grid');">-</a><tt class="py-line"><tt class="py-keyword">class</tt> <a class="py-def-name" href="SatStress.GridCalc.Grid-class.html">Grid</a><tt class="py-op">(</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> <tt class="py-comment">#</tt> </tt>
</div><a name="L204"></a><tt class="py-lineno">204</tt>  <tt class="py-line">    <tt class="py-docstring">"""</tt> </tt>
<a name="L205"></a><tt class="py-lineno">205</tt>  <tt class="py-line"><tt class="py-docstring">    A container class defining the temporal and geographic range and resolution</tt> </tt>
<a name="L206"></a><tt class="py-lineno">206</tt>  <tt class="py-line"><tt class="py-docstring">    of the calculation.</tt> </tt>
<a name="L207"></a><tt class="py-lineno">207</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L208"></a><tt class="py-lineno">208</tt>  <tt class="py-line"><tt class="py-docstring">    The parameters defining the calculation grid are read in from a name value</tt> </tt>
<a name="L209"></a><tt class="py-lineno">209</tt>  <tt class="py-line"><tt class="py-docstring">    file, parsed into a Python dictionary using L{SatStress.nvf2dict}, and used</tt> </tt>
<a name="L210"></a><tt class="py-lineno">210</tt>  <tt class="py-line"><tt class="py-docstring">    to set the data attributes of the L{Grid} object.</tt> </tt>
<a name="L211"></a><tt class="py-lineno">211</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L212"></a><tt class="py-lineno">212</tt>  <tt class="py-line"><tt class="py-docstring">    The geographic extent of the calculation is specified by minimum and maximum</tt> </tt>
<a name="L213"></a><tt class="py-lineno">213</tt>  <tt class="py-line"><tt class="py-docstring">    values for latitude and longitude.</tt> </tt>
<a name="L214"></a><tt class="py-lineno">214</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L215"></a><tt class="py-lineno">215</tt>  <tt class="py-line"><tt class="py-docstring">    The geographic resolution of the calculation is defined by an angular</tt> </tt>
<a name="L216"></a><tt class="py-lineno">216</tt>  <tt class="py-line"><tt class="py-docstring">    separation between calculations.  This angular separation is the same in</tt> </tt>
<a name="L217"></a><tt class="py-lineno">217</tt>  <tt class="py-line"><tt class="py-docstring">    the north-south and the east-west direction.</tt> </tt>
<a name="L218"></a><tt class="py-lineno">218</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L219"></a><tt class="py-lineno">219</tt>  <tt class="py-line"><tt class="py-docstring">    The temporal range and resolution of the calculation can be specified either</tt> </tt>
<a name="L220"></a><tt class="py-lineno">220</tt>  <tt class="py-line"><tt class="py-docstring">    in terms of actual time units (seconds) or in terms of the satellite's orbital</tt> </tt>
<a name="L221"></a><tt class="py-lineno">221</tt>  <tt class="py-line"><tt class="py-docstring">    position (in degrees).  In both cases, time=0 is taken to occur at periapse.</tt> </tt>
<a name="L222"></a><tt class="py-lineno">222</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L223"></a><tt class="py-lineno">223</tt>  <tt class="py-line"><tt class="py-docstring">    S{Delta} is a measure of how viscous or elastic the response of the body</tt> </tt>
<a name="L224"></a><tt class="py-lineno">224</tt>  <tt class="py-line"><tt class="py-docstring">    is.  It's equal to (S{mu})/(S{eta}S{omega}) where S{mu} and S{eta} are the</tt> </tt>
<a name="L225"></a><tt class="py-lineno">225</tt>  <tt class="py-line"><tt class="py-docstring">    shear modulus and viscosity of the surface layer, respectively, and</tt> </tt>
<a name="L226"></a><tt class="py-lineno">226</tt>  <tt class="py-line"><tt class="py-docstring">    S{omega} is the forcing frequency to which the body is subjected (see Wahr</tt> </tt>
<a name="L227"></a><tt class="py-lineno">227</tt>  <tt class="py-line"><tt class="py-docstring">    et al. (2008) for a detailed discussion).  It is a logarithmic parameter, so</tt> </tt>
<a name="L228"></a><tt class="py-lineno">228</tt>  <tt class="py-line"><tt class="py-docstring">    its bounds are specified as powers of 10, e.g. if the minimum value is -3,</tt> </tt>
<a name="L229"></a><tt class="py-lineno">229</tt>  <tt class="py-line"><tt class="py-docstring">    the initial S{Delta} is 10^-3 = 0.001.</tt> </tt>
<a name="L230"></a><tt class="py-lineno">230</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L231"></a><tt class="py-lineno">231</tt>  <tt class="py-line"><tt class="py-docstring">    @ivar grid_id: A string identifying the grid</tt> </tt>
<a name="L232"></a><tt class="py-lineno">232</tt>  <tt class="py-line"><tt class="py-docstring">    @type grid_id: str</tt> </tt>
<a name="L233"></a><tt class="py-lineno">233</tt>  <tt class="py-line"><tt class="py-docstring">    @ivar lat_min: Southern bound, degrees (north positive).</tt> </tt>
<a name="L234"></a><tt class="py-lineno">234</tt>  <tt class="py-line"><tt class="py-docstring">    @type lat_min: float</tt> </tt>
<a name="L235"></a><tt class="py-lineno">235</tt>  <tt class="py-line"><tt class="py-docstring">    @ivar lat_max: Northern bound, degrees (north positive).</tt> </tt>
<a name="L236"></a><tt class="py-lineno">236</tt>  <tt class="py-line"><tt class="py-docstring">    @type lat_max: float</tt> </tt>
<a name="L237"></a><tt class="py-lineno">237</tt>  <tt class="py-line"><tt class="py-docstring">    @ivar lon_min: Western bound, degrees (east positive).</tt> </tt>
<a name="L238"></a><tt class="py-lineno">238</tt>  <tt class="py-line"><tt class="py-docstring">    @type lon_min: float</tt> </tt>
<a name="L239"></a><tt class="py-lineno">239</tt>  <tt class="py-line"><tt class="py-docstring">    @ivar lon_max: Eastern bound, degrees (east positive).</tt> </tt>
<a name="L240"></a><tt class="py-lineno">240</tt>  <tt class="py-line"><tt class="py-docstring">    @type lon_max: float</tt> </tt>
<a name="L241"></a><tt class="py-lineno">241</tt>  <tt class="py-line"><tt class="py-docstring">    @ivar latlon_step: Angular separation between calculations.</tt> </tt>
<a name="L242"></a><tt class="py-lineno">242</tt>  <tt class="py-line"><tt class="py-docstring">    @type latlon_step: float</tt> </tt>
<a name="L243"></a><tt class="py-lineno">243</tt>  <tt class="py-line"><tt class="py-docstring">    @ivar time_min: Initial time at which calculation begins (0 = periapse).</tt> </tt>
<a name="L244"></a><tt class="py-lineno">244</tt>  <tt class="py-line"><tt class="py-docstring">    @type time_min: float</tt> </tt>
<a name="L245"></a><tt class="py-lineno">245</tt>  <tt class="py-line"><tt class="py-docstring">    @ivar time_max: Final time at which calculation ends.</tt> </tt>
<a name="L246"></a><tt class="py-lineno">246</tt>  <tt class="py-line"><tt class="py-docstring">    @type time_max: float</tt> </tt>
<a name="L247"></a><tt class="py-lineno">247</tt>  <tt class="py-line"><tt class="py-docstring">    @ivar time_step: Seconds between subsequent calculations.</tt> </tt>
<a name="L248"></a><tt class="py-lineno">248</tt>  <tt class="py-line"><tt class="py-docstring">    @type time_step: float</tt> </tt>
<a name="L249"></a><tt class="py-lineno">249</tt>  <tt class="py-line"><tt class="py-docstring">    @ivar orbit_min: Initial orbital position in degrees (0 = periapse)</tt> </tt>
<a name="L250"></a><tt class="py-lineno">250</tt>  <tt class="py-line"><tt class="py-docstring">    @type orbit_min: float</tt> </tt>
<a name="L251"></a><tt class="py-lineno">251</tt>  <tt class="py-line"><tt class="py-docstring">    @ivar orbit_max: Final orbital position in degrees (0 = periapse)</tt> </tt>
<a name="L252"></a><tt class="py-lineno">252</tt>  <tt class="py-line"><tt class="py-docstring">    @type orbit_max: float</tt> </tt>
<a name="L253"></a><tt class="py-lineno">253</tt>  <tt class="py-line"><tt class="py-docstring">    @ivar orbit_step: Orbital angular separation between calculations in degrees</tt> </tt>
<a name="L254"></a><tt class="py-lineno">254</tt>  <tt class="py-line"><tt class="py-docstring">    @type orbit_step: float</tt> </tt>
<a name="L255"></a><tt class="py-lineno">255</tt>  <tt class="py-line"><tt class="py-docstring">    @ivar nsr_delta_min: Initial S{Delta} = 10^(nsr_delta_min)</tt> </tt>
<a name="L256"></a><tt class="py-lineno">256</tt>  <tt class="py-line"><tt class="py-docstring">    @type nsr_delta_min: float</tt> </tt>
<a name="L257"></a><tt class="py-lineno">257</tt>  <tt class="py-line"><tt class="py-docstring">    @ivar nsr_delta_max: Final S{Delta} = 10^(nsr_delta_max)</tt> </tt>
<a name="L258"></a><tt class="py-lineno">258</tt>  <tt class="py-line"><tt class="py-docstring">    @type nsr_delta_max: float</tt> </tt>
<a name="L259"></a><tt class="py-lineno">259</tt>  <tt class="py-line"><tt class="py-docstring">    @ivar nsr_delta_numsteps: How many S{Delta} values to calculate total</tt> </tt>
<a name="L260"></a><tt class="py-lineno">260</tt>  <tt class="py-line"><tt class="py-docstring">    @type nsr_delta_numsteps: int</tt> </tt>
<a name="L261"></a><tt class="py-lineno">261</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L262"></a><tt class="py-lineno">262</tt>  <tt class="py-line"><tt class="py-docstring">    """</tt> </tt>
<a name="L263"></a><tt class="py-lineno">263</tt>  <tt class="py-line"> </tt>
<a name="Grid.__init__"></a><div id="Grid.__init__-def"><a name="L264"></a><tt class="py-lineno">264</tt> <a class="py-toggle" href="#" id="Grid.__init__-toggle" onclick="return toggle('Grid.__init__');">-</a><tt class="py-line">    <tt class="py-keyword">def</tt> <a class="py-def-name" href="SatStress.GridCalc.Grid-class.html#__init__">__init__</a><tt class="py-op">(</tt><tt class="py-param">self</tt><tt class="py-op">,</tt> <tt class="py-param">gridFile</tt><tt class="py-op">,</tt> <tt class="py-param">satellite</tt><tt class="py-op">=</tt><tt class="py-name">None</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="Grid.__init__-collapsed" style="display:none;" pad="+++" indent="++++++++"></div><div id="Grid.__init__-expanded"><a name="L265"></a><tt class="py-lineno">265</tt>  <tt class="py-line">        <tt class="py-docstring">"""Initialize the Grid object from a gridFile."""</tt> </tt>
<a name="L266"></a><tt class="py-lineno">266</tt>  <tt class="py-line"> </tt>
<a name="L267"></a><tt class="py-lineno">267</tt>  <tt class="py-line">        <tt class="py-comment"># Slurp up the proffered parameters:</tt> </tt>
<a name="L268"></a><tt class="py-lineno">268</tt>  <tt class="py-line"><tt class="py-comment"></tt>        <tt class="py-name">gridParams</tt> <tt class="py-op">=</tt> <tt class="py-name">SS</tt><tt class="py-op">.</tt><tt id="link-13" class="py-name" targets="Function SatStress.SatStress.nvf2dict()=SatStress.SatStress-module.html#nvf2dict"><a title="SatStress.SatStress.nvf2dict" class="py-name" href="#" onclick="return doclink('link-13', 'nvf2dict', 'link-13');">nvf2dict</a></tt><tt class="py-op">(</tt><tt class="py-name">gridFile</tt><tt class="py-op">,</tt> <tt class="py-name">comment</tt><tt class="py-op">=</tt><tt class="py-string">'#'</tt><tt class="py-op">)</tt> </tt>
<a name="L269"></a><tt class="py-lineno">269</tt>  <tt class="py-line">         </tt>
<a name="L270"></a><tt class="py-lineno">270</tt>  <tt class="py-line">        <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">grid_id</tt> <tt class="py-op">=</tt> <tt class="py-name">gridParams</tt><tt class="py-op">[</tt><tt class="py-string">'GRID_ID'</tt><tt class="py-op">]</tt> </tt>
<a name="L271"></a><tt class="py-lineno">271</tt>  <tt class="py-line"> </tt>
<a name="L272"></a><tt class="py-lineno">272</tt>  <tt class="py-line">        <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">lat_min</tt>     <tt class="py-op">=</tt> <tt class="py-name">float</tt><tt class="py-op">(</tt><tt class="py-name">gridParams</tt><tt class="py-op">[</tt><tt class="py-string">'LAT_MIN'</tt><tt class="py-op">]</tt><tt class="py-op">)</tt> </tt>
<a name="L273"></a><tt class="py-lineno">273</tt>  <tt class="py-line">        <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">lat_max</tt>     <tt class="py-op">=</tt> <tt class="py-name">float</tt><tt class="py-op">(</tt><tt class="py-name">gridParams</tt><tt class="py-op">[</tt><tt class="py-string">'LAT_MAX'</tt><tt class="py-op">]</tt><tt class="py-op">)</tt> </tt>
<a name="L274"></a><tt class="py-lineno">274</tt>  <tt class="py-line">        <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">lon_min</tt>     <tt class="py-op">=</tt> <tt class="py-name">float</tt><tt class="py-op">(</tt><tt class="py-name">gridParams</tt><tt class="py-op">[</tt><tt class="py-string">'LON_MIN'</tt><tt class="py-op">]</tt><tt class="py-op">)</tt> </tt>
<a name="L275"></a><tt class="py-lineno">275</tt>  <tt class="py-line">        <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">lon_max</tt>     <tt class="py-op">=</tt> <tt class="py-name">float</tt><tt class="py-op">(</tt><tt class="py-name">gridParams</tt><tt class="py-op">[</tt><tt class="py-string">'LON_MAX'</tt><tt class="py-op">]</tt><tt class="py-op">)</tt> </tt>
<a name="L276"></a><tt class="py-lineno">276</tt>  <tt class="py-line">        <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">latlon_step</tt> <tt class="py-op">=</tt> <tt class="py-name">float</tt><tt class="py-op">(</tt><tt class="py-name">gridParams</tt><tt class="py-op">[</tt><tt class="py-string">'LATLON_STEP'</tt><tt class="py-op">]</tt><tt class="py-op">)</tt> </tt>
<a name="L277"></a><tt class="py-lineno">277</tt>  <tt class="py-line"> </tt>
<a name="L278"></a><tt class="py-lineno">278</tt>  <tt class="py-line">        <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">nsr_delta_numsteps</tt> <tt class="py-op">=</tt> <tt class="py-name">float</tt><tt class="py-op">(</tt><tt class="py-name">gridParams</tt><tt class="py-op">[</tt><tt class="py-string">'NSR_DELTA_NUMSTEPS'</tt><tt class="py-op">]</tt><tt class="py-op">)</tt> </tt>
<a name="L279"></a><tt class="py-lineno">279</tt>  <tt class="py-line">        <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">nsr_delta_min</tt>  <tt class="py-op">=</tt> <tt class="py-name">float</tt><tt class="py-op">(</tt><tt class="py-name">gridParams</tt><tt class="py-op">[</tt><tt class="py-string">'NSR_DELTA_MIN'</tt><tt class="py-op">]</tt><tt class="py-op">)</tt> </tt>
<a name="L280"></a><tt class="py-lineno">280</tt>  <tt class="py-line">        <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">nsr_delta_max</tt>  <tt class="py-op">=</tt> <tt class="py-name">float</tt><tt class="py-op">(</tt><tt class="py-name">gridParams</tt><tt class="py-op">[</tt><tt class="py-string">'NSR_DELTA_MAX'</tt><tt class="py-op">]</tt><tt class="py-op">)</tt> </tt>
<a name="L281"></a><tt class="py-lineno">281</tt>  <tt class="py-line"> </tt>
<a name="L282"></a><tt class="py-lineno">282</tt>  <tt class="py-line">        <tt class="py-comment"># We MUST have all three of either of these and NONE of the other.</tt> </tt>
<a name="L283"></a><tt class="py-lineno">283</tt>  <tt class="py-line"><tt class="py-comment"></tt>        <tt class="py-keyword">if</tt> <tt class="py-name">gridParams</tt><tt class="py-op">.</tt><tt class="py-name">has_key</tt><tt class="py-op">(</tt><tt class="py-string">'TIME_MIN'</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
<a name="L284"></a><tt class="py-lineno">284</tt>  <tt class="py-line">            <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">time_min</tt>  <tt class="py-op">=</tt> <tt class="py-name">float</tt><tt class="py-op">(</tt><tt class="py-name">gridParams</tt><tt class="py-op">[</tt><tt class="py-string">'TIME_MIN'</tt><tt class="py-op">]</tt><tt class="py-op">)</tt> </tt>
<a name="L285"></a><tt class="py-lineno">285</tt>  <tt class="py-line">            <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">time_max</tt>  <tt class="py-op">=</tt> <tt class="py-name">float</tt><tt class="py-op">(</tt><tt class="py-name">gridParams</tt><tt class="py-op">[</tt><tt class="py-string">'TIME_MAX'</tt><tt class="py-op">]</tt><tt class="py-op">)</tt> </tt>
<a name="L286"></a><tt class="py-lineno">286</tt>  <tt class="py-line">            <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">time_step</tt> <tt class="py-op">=</tt> <tt class="py-name">float</tt><tt class="py-op">(</tt><tt class="py-name">gridParams</tt><tt class="py-op">[</tt><tt class="py-string">'TIME_STEP'</tt><tt class="py-op">]</tt><tt class="py-op">)</tt> </tt>
<a name="L287"></a><tt class="py-lineno">287</tt>  <tt class="py-line"> </tt>
<a name="L288"></a><tt class="py-lineno">288</tt>  <tt class="py-line">            <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">orbit_min</tt>  <tt class="py-op">=</tt> <tt class="py-name">None</tt> </tt>
<a name="L289"></a><tt class="py-lineno">289</tt>  <tt class="py-line">            <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">orbit_max</tt>  <tt class="py-op">=</tt> <tt class="py-name">None</tt> </tt>
<a name="L290"></a><tt class="py-lineno">290</tt>  <tt class="py-line">            <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">orbit_step</tt> <tt class="py-op">=</tt> <tt class="py-name">None</tt> </tt>
<a name="L291"></a><tt class="py-lineno">291</tt>  <tt class="py-line"> </tt>
<a name="L292"></a><tt class="py-lineno">292</tt>  <tt class="py-line">        <tt class="py-keyword">elif</tt> <tt class="py-name">gridParams</tt><tt class="py-op">.</tt><tt class="py-name">has_key</tt><tt class="py-op">(</tt><tt class="py-string">'ORBIT_MIN'</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
<a name="L293"></a><tt class="py-lineno">293</tt>  <tt class="py-line">            <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">orbit_min</tt>  <tt class="py-op">=</tt> <tt class="py-name">float</tt><tt class="py-op">(</tt><tt class="py-name">gridParams</tt><tt class="py-op">[</tt><tt class="py-string">'ORBIT_MIN'</tt><tt class="py-op">]</tt><tt class="py-op">)</tt> </tt>
<a name="L294"></a><tt class="py-lineno">294</tt>  <tt class="py-line">            <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">orbit_max</tt>  <tt class="py-op">=</tt> <tt class="py-name">float</tt><tt class="py-op">(</tt><tt class="py-name">gridParams</tt><tt class="py-op">[</tt><tt class="py-string">'ORBIT_MAX'</tt><tt class="py-op">]</tt><tt class="py-op">)</tt> </tt>
<a name="L295"></a><tt class="py-lineno">295</tt>  <tt class="py-line">            <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">orbit_step</tt> <tt class="py-op">=</tt> <tt class="py-name">float</tt><tt class="py-op">(</tt><tt class="py-name">gridParams</tt><tt class="py-op">[</tt><tt class="py-string">'ORBIT_STEP'</tt><tt class="py-op">]</tt><tt class="py-op">)</tt> </tt>
<a name="L296"></a><tt class="py-lineno">296</tt>  <tt class="py-line"> </tt>
<a name="L297"></a><tt class="py-lineno">297</tt>  <tt class="py-line">            <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">time_min</tt>  <tt class="py-op">=</tt> <tt id="link-14" class="py-name"><a title="SatStress.SatStress.StressDef.satellite" class="py-name" href="#" onclick="return doclink('link-14', 'satellite', 'link-3');">satellite</a></tt><tt class="py-op">.</tt><tt id="link-15" class="py-name"><a title="SatStress.SatStress.Satellite.orbit_period" class="py-name" href="#" onclick="return doclink('link-15', 'orbit_period', 'link-8');">orbit_period</a></tt><tt class="py-op">(</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-op">(</tt><tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">orbit_min</tt><tt class="py-op">/</tt><tt class="py-number">360.0</tt><tt class="py-op">)</tt> </tt>
<a name="L298"></a><tt class="py-lineno">298</tt>  <tt class="py-line">            <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">time_max</tt>  <tt class="py-op">=</tt> <tt id="link-16" class="py-name"><a title="SatStress.SatStress.StressDef.satellite" class="py-name" href="#" onclick="return doclink('link-16', 'satellite', 'link-3');">satellite</a></tt><tt class="py-op">.</tt><tt id="link-17" class="py-name"><a title="SatStress.SatStress.Satellite.orbit_period" class="py-name" href="#" onclick="return doclink('link-17', 'orbit_period', 'link-8');">orbit_period</a></tt><tt class="py-op">(</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-op">(</tt><tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">orbit_max</tt><tt class="py-op">/</tt><tt class="py-number">360.0</tt><tt class="py-op">)</tt> </tt>
<a name="L299"></a><tt class="py-lineno">299</tt>  <tt class="py-line">            <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">time_step</tt> <tt class="py-op">=</tt> <tt id="link-18" class="py-name"><a title="SatStress.SatStress.StressDef.satellite" class="py-name" href="#" onclick="return doclink('link-18', 'satellite', 'link-3');">satellite</a></tt><tt class="py-op">.</tt><tt id="link-19" class="py-name"><a title="SatStress.SatStress.Satellite.orbit_period" class="py-name" href="#" onclick="return doclink('link-19', 'orbit_period', 'link-8');">orbit_period</a></tt><tt class="py-op">(</tt><tt class="py-op">)</tt><tt class="py-op">*</tt><tt class="py-op">(</tt><tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">orbit_step</tt><tt class="py-op">/</tt><tt class="py-number">360.0</tt><tt class="py-op">)</tt> </tt>
<a name="L300"></a><tt class="py-lineno">300</tt>  <tt class="py-line"> </tt>
<a name="L301"></a><tt class="py-lineno">301</tt>  <tt class="py-line">        <tt class="py-keyword">else</tt><tt class="py-op">:</tt> </tt>
<a name="L302"></a><tt class="py-lineno">302</tt>  <tt class="py-line">            <tt class="py-comment"># Die with an error about bad input file...</tt> </tt>
<a name="L303"></a><tt class="py-lineno">303</tt>  <tt class="py-line"><tt class="py-comment"></tt>            <tt class="py-keyword">pass</tt> </tt>
</div></div><a name="L304"></a><tt class="py-lineno">304</tt>  <tt class="py-line">     </tt>
<a name="L305"></a><tt class="py-lineno">305</tt>  <tt class="py-line"><tt class="py-comment">#  end class Grid</tt> </tt>
<a name="L306"></a><tt class="py-lineno">306</tt>  <tt class="py-line"><tt class="py-comment"></tt> </tt>
<a name="L307"></a><tt class="py-lineno">307</tt>  <tt class="py-line"><tt class="py-keyword">if</tt> <tt class="py-name">__name__</tt> <tt class="py-op">==</tt> <tt class="py-string">"__main__"</tt><tt class="py-op">:</tt> </tt>
<a name="L308"></a><tt class="py-lineno">308</tt>  <tt class="py-line">    <tt id="link-20" class="py-name" targets="Function SatStress.GridCalc.main()=SatStress.GridCalc-module.html#main"><a title="SatStress.GridCalc.main" class="py-name" href="#" onclick="return doclink('link-20', 'main', 'link-20');">main</a></tt><tt class="py-op">(</tt><tt class="py-op">)</tt> </tt>
<a name="L309"></a><tt class="py-lineno">309</tt>  <tt class="py-line"> </tt><script type="text/javascript">
<!--
expandto(location.href);
// -->
</script>
</pre>
<br />
<!-- ==================== NAVIGATION BAR ==================== -->
<table class="navbar" border="0" width="100%" cellpadding="0"
       bgcolor="#a0c0ff" cellspacing="0">
  <tr valign="middle">
  <!-- Home link -->
      <th>&nbsp;&nbsp;&nbsp;<a
        href="SatStress-module.html">Home</a>&nbsp;&nbsp;&nbsp;</th>

  <!-- Tree link -->
      <th>&nbsp;&nbsp;&nbsp;<a
        href="module-tree.html">Trees</a>&nbsp;&nbsp;&nbsp;</th>

  <!-- Index link -->
      <th>&nbsp;&nbsp;&nbsp;<a
        href="identifier-index.html">Indices</a>&nbsp;&nbsp;&nbsp;</th>

  <!-- Help link -->
      <th>&nbsp;&nbsp;&nbsp;<a
        href="help.html">Help</a>&nbsp;&nbsp;&nbsp;</th>

  <!-- Project homepage -->
      <th class="navbar" align="right" width="100%">
        <table border="0" cellpadding="0" cellspacing="0">
          <tr><th class="navbar" align="center"
            ><a class="navbar" target="_top" href="http://code.google.com/p/satstress">SatStress</a></th>
          </tr></table></th>
  </tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" width="100%%">
  <tr>
    <td align="left" class="footer">
    Generated by Epydoc 3.0.1 on Thu Apr  3 16:42:45 2008
    </td>
    <td align="right" class="footer">
      <a target="mainFrame" href="http://epydoc.sourceforge.net"
        >http://epydoc.sourceforge.net</a>
    </td>
  </tr>
</table>

<script type="text/javascript">
  <!--
  // Private objects are initially displayed (because if
  // javascript is turned off then we want them to be
  // visible); but by default, we want to hide them.  So hide
  // them unless we have a cookie that says to show them.
  checkCookie();
  // -->
</script>
</body>
</html>
